ellis



(No Model.)

J. T. ELLIS. STEAM BOILER FURNACE.

No. 446,705, Patented Feb. 17,1891.

l K e Mfixeases [Mercfor 56w 7 Org/z 21% g UNITED STATES PATENT nines.

JOHN T. ELLIS, OF TORONTO, CANADA.

STEAM-BOILER FURNACE.

SPECIFICATION forming part of Letters Patent No. 446,705, dated February 17, 1891.

Application filed August 26,1890.

To all whom it may concern.-

Be it known that I, JOHN Tnoluas ELLIs, engineer, of the city of Toronto, in the county of York, in the Province of Ontario, Canada, have invented a certain new and useful Improvement in Steam-BoilerFurnaces, of which the following is a specification.

The object of the invention is to design a simple apparatus by which air and steam separately or combined is admitted into the furnace, so as to practically produce perfect combustion of the burning fuel; and it consists in the peculiar construction, arrangement, and combinations of parts hereinafter more particularly described, and then definitely claimed.

Figure l is a perspective sectional elevation of a steam-boiler furnace provided with my improved smoke-consuming apparatus. Fig. 2 is an enlarged detail of the furnace-door and device for automatically closing it. Fig. Sis an enlarged detail of the fish-tail end of the pipe.

A represents an air pipe connected at one end to the air-chamber of the air-pump B.

O is a fish-tail outlet formed upon or attached to the end of the pipe A and projecting into the furnace D, as indicated. The fish-tail outlet O, is set at an angle pointing toward a point near the base of the bridgeE.

F is a steam-pipe communicating at one end with the steam-space of the boiler G. The other end of the steam-pipe F enters the airpipe A and connects with a small pipe located inside of the said pipe A, forming a continir ation of the steam-pipe F through the said air-pipe A, at the iislrtail outlet of which the inner steam-pipe F is branched, so that the steam escaping from it is spread to correspond with the spread of the fishtail outlet. The air-pipe A is provided with a cut-off valve ll, located between the steam-pipe F and the pump D. The steam-pipe F is provided with a similar cut-oft valve 1. I These valves permit the supply of steam and air tobe easily regulated, and the supply of either may be entirely out off, when desired.

J represents a vertical pipe embedded in the bridge E. This pipe is tapered toward its upper end, which communicates with the furnace at or near the top of the said bridge Serial No. 363,111. (No model.)

E. The lower end of the pipe J' enters the ash-pit K, and is provided with an adj ustable gate or valve L, by which the size of its lower opening may be regulated.

I showonly one pipe J; butit will of coursebe understood that a series of similar pipes may be arranged in the bridge E. The air which passes through the pipe or pipes J is heated and enters the furnace atthe point where the smoke accumulates, and by thus supplying fresh oxygen at this point the combustion is greatly improved. By connecting the airpipe A to a pump I am able to force the air under pressure into the furnace, and thus force the oxygen to the rear of the furnace, where the combuustion would otherwise be imperfect.

On reference to Fig. 2 the arrangement by which the door is automatically closed will be understood, and before describing it I may mention that when fresh fuel is put into the furnace the combustion is of course slow and an additional supply of oxygen is required to consume the smoke.

M. is the furnace door, and N is alatch pivoted at its center upon the furnace-door M. Two small watcntanks O O are fixed to the latch N, one on each side of its pivot. These water-tanks are connected together by the pipe P. lVhen the latch N is raised to open the furnace-door, the water flows into the tank O on the hinged side of the latch-pivot and holds the said latch open. hen the door is closed and the latch N entered into the slanting slot din the catch Q, the door M will still be open sufficiently to admit the air into the furnace. The latch N should be pressed down in the slanting slot a sufficiently toraise the back tank 0 slightly above the tank O near the front edge of the furnacedoor M. The door should then be left alone, when the water flowing from the back tank into the front tank will gradually force the latch N down the slot a, and as the said slot slants toward the furnace the door M will gradually be closed. I usually regulate it so that the door takes about two and ahalf minutes to close; but of course this time may be easily increased or decreased, as required, by simply altering the size of the pipe P. What I claim. as my invention is- ICO 1. An nir-pipe eon nected to a force-pump one on either side of its pivot and connected and provided with a lislrtnil outlet extcndtogether at their bott0n1s,in combination with ing into the front of a furnace, in combinaa catch having an inwardly-slanting slot to tion with a steam-pipe located Within the airreceive the latch.

5 pipe and connected at one end to the steznn- Toronto, July 2.), 1800.

boiler and having on its other end a branched V r outlet, substantially as and for the purpose I JOHN ELLIS specified. In presence of- 2. A fnrnace-door provided with a pivoted CHARLES C. BALDWIN,

1o latch having, a small water-tank fixed to it, F. A. \VOODWARD. 

